Concrete reinforcement.



H. B. WHITE. GONURETE REINFORCEMENT. APPLICATION FILED DEC. 21; 190B.

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' APILIOATION FILED DEC. 21, 1908. I

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HERBERT E. WHITE, 01:" YOUNGSTOWN, O HID, ASSIGNOIB, TO THE GENERALFIBEPROOF- ING COMPANY, OF NEW YORK, N. Y., COILPORATION OF OHIO.

,CONCRETE REINFORCEMENT.

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specification of Letters Patent. Patented Jan. Elfin, jttilffl.

Application filetl Dccemocr 21, 1908. Serial No. 468,4:16.

drawings, forming part of this specification,

in which.-

, Figure 1 1s a perspective new of a con crete reinforcement embodyingmy inven- .tion; Fig. 2 is a detail perspective view showing a modifiedform of the cent al shear members; Fig. 3 1s a cross section on line111-111 Fig.1; Fig. 4 is a dctailpoispeca,

tive viewof another form of shear members and l igs 5, 6 and 7 aresectional views showing different/forms of the main or tension bar ofthe reinforcement.

My invention relates to the class of concrete reinforcements, and isdesigned to pro vide means of simple, novel' and efficient character forsecuring the shear members to the main or tension bar of thereinforcement; also to provide meansfor effectively increasingdissection of the intermediate portion of the main or tension barwhichis subjected to the greatest tensile stress without increasing the metalin the end portions of the bar, thereby providing for a maximum strengthwith a minimum amount of metal; and also to provide means of novelcharacter for supporting the reinforcement in the forms or. molds in theprocess of construction.

The nature of my invention will be best understood by reference to theaccompanying drawings in which I have shown the preferred embodimentthereof, and which will now be described, it being premised however thatvarious changes may be made in the construction and arrangement of theparts by those skilled in the art without departing from the spirit andscope of my in vention as defined in the appended claims.

In these drawings the numeral 2 designates the main or tension. bar ofthe reinforcement, which may be'of any approved cross-sectional form,such as the ellipse shown in Figs. 1 and 3 or the tllttll'lUlltl shownin Figs. 5, 6, and 7. This bar is provided at its upperside with a ribor flange 2-3, which is preferably continuous throughout the length ofthe bar, and which 13 sheen as of 'l'-shape in cross-section,

the

thereby providing the lateral grooves at to receive the ends of theshear members in manner hereinafter described. The body portion of thebar may be, and is, preferably, provided vith suitable lateral. bondingprojections or deformations 5.

t3 designate the shear members, which preferably consist of loops ofmetal formed by bending rods of suitable cross section upon themselvesto form parallel sided loopsclosed at their upper ends, the free ends ofthe rods being seated in the grooves 4 at each side of the rib or flange3, and. so

cured therein by means of the bent clips or clamps 'Z. One or both ofthe free ends of all or some of the shear members are pref erablyextended through theclips or clamps, and are carried downwardly andbentin the direction of the longitudinalaxis of the bar 2 as shown at 8, forthe purpose of forming means for supporting the reinforcing structure inthe forms or molds in the process of. construction of thereinforceconcrete work, whereby proper space for the concrete will be providedunderneath the bars The upper ends of the looped shear members may be,if desired, given. quarter turns as shown at 9 in Fig. 4 to form eyes toreceive the floor slab reinforcing rods 10. The shear members adjacentto the long-i tudi'nal center of the-bar 2 may be extended continuouslyfrom one to the other, asshown in Fig. 1, thereby providing for materialreinforcement of the central portion of the bar 2 where the tensilestress is the greatest. The upper ends of these two central shearmembers may be closed as shown in Fig. l, or two separate rods may beemployed as shown in Fig. 2 with their free ends left. disconnected.

l1 designates a supplemental reinforcing bar, which may or may not beemployed. \Vhen this bar is employed, it is preferably arranged as shownin Fig. 1, being extended. through the loops of the shear members, withits end portions bent obliquely upward as shown at 12, thence parallelwith the bar 2 as shown at 13, for the purpose of resisting the tensilestress'caused by the neeative bending, moments over the point orsupport. The alntiliary reinforcing;- lirars'of adjacent reinforcingstructures may be con' nectcd in any suitable manner, preferably bymeans of the'connecting links 1e shown in Fig. l. i v

Fig. (i'shows a modified form of bar 'having only one lateral groove 15to receive the end portion of a singleshear member 16.

Fig. 7 shows another which the bar. has two ribs orflanges' 17, eachribor flange forming a groove 18 for a shear member. i

The advantages of my invention result from theprovision of the simpleand etlicient means for rigidly securing the shear members to the mainor tension bar without the necessity for punching or otherwiseperforating such bar, this being accomplished by means of clips orclamps of malleable metal, which can be readily bent to firmly grasp andsecure the end portions of the shear members; from the manner in whichthe central shear members are constructed and arranged so as to form amaterial reinforcement of the central portion of the main or tensionbar; from the" manner in which the shear members form a carrier orcradle for the auxiliary reinforcing bar, and also when desiredfor thefloor slab reinforcing bars; and'also from the simple, practicalconstruction of the structure as a whole, whereby a reinforcement isprovided having a maximum strength with the use of a mlnimu1n amount ofmetal.

For convenience, in shipping the reinforce ing structures, the shearmembers may be left substantially parallel with the bar 2 and bentupwardly into their normal oblique positions at the place where thereinforcing structure is to be used.

It will be obvious that many changes can be made in the details ofconstruction and arrangement without departing from the spirit and scopeof my invention. Thus, the main tension bars may be of othercrosssections than those shown, they may be provided with any suitablebonding surfaces; the form of the clips or clam'ps which secure theshear members can be varied, and the shear members themselves may be constructed in different ways.

Vhat I claim is 1. A metallic reinforcement for concrete, comprising amain tension bar formed with opposite lateral grooves, looped shearmembers having portions lying longitudinally within the said grooves andclips engaging over the upper side of the bar and securmg the shearmembers in the grooves, and a supmodification in and floor slabreinforcing members passing-- throughsaid eyes in a directionsubstantially at right angles to the length of the tension members;substantially as described. 3. A metallic reinforcement for concretehaving a main tension bar formed with lateral grooves, and shear membershaving longitudinally extending portions seated in said grooves andclips embracing said end por-, tions and securing them in said grooves,some of said shear members having portions extending continuously withinsaid grooves between said members to form reinforcements for said bar,substantially as de-' scribed.

4. A metallic reinforcement for concrete, comprising a main tension. barformed with opposite lateral grooves, and shear members having theirlower end portions extending in the direction of said grooves and seatedtherein, together with separate clips having their end portions engagingwith said grooves and securing the shear members .therein, some of saidshear members having portlons.extending continuously within said groovesbetween said members to form reinforcements for said bar; substantiallyas described.-

3. A metallic reinforcement for concrete, comprising a main tension barhaving longi tudinally extending grooves at opposite sides thereof, andshear members having portions extending in the direct-ion of saidgrooves and'seated and secured therein, and having their free lower endsbent backwardly underiieath the main tension bar to form support ingfeet; substantially as described;

In testimony whereof, I have hereunto set my hand. HERBER'E '\'v HITE.

W'itnesses: Geo. B. BLEMING,

GEORGE H. PARMELEE.

